Daily records
Page built 2026-10-19
Data as of 2026-10-12
Search
Built 2026-10-19 (19 October 2026)

Hanko Tvarminne Threshold Days by Year (FIE00142025)

10 fixed thresholds counted per year at Hanko Tvarminne (FIE00142025): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanko Tvarminne Thresholds

  • Hanko Tvarminne: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 2010 with 105.
  • Hanko Tvarminne: nights with a minimum temperature at or below 0 C (32 F) in 64 years, most in 1966 with 160.
  • Hanko Tvarminne: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 2012 with 27.
  • Hanko Tvarminne: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1963 with 69.
  • 10 fixed thresholds have at least one qualifying day at Hanko Tvarminne.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Hanko Tvarminne Days per year at Hanko Tvarminne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1983. 01231975: 11983: 31986: 12019: 11975198319862019
Days per year at Hanko Tvarminne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1983.
Days at or above 30 C (86 F) per year at Hanko Tvarminne
YearDaysDecade average
197511
198332
198612
201911
First to last qualifying date each year at Hanko Tvarminne For each year, a bar from the first to the last day at Hanko Tvarminne meeting 30 C (86 F). 1975: 5 August 1975 to 5 August 19751983: 9 July 1983 to 11 July 19831986: 27 June 1986 to 27 June 19862019: 28 July 2019 to 28 July 20191975198319862019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hanko Tvarminne meeting 30 C (86 F).
First to last qualifying date each year at Hanko Tvarminne
YearFirst dateLast date
19751975-08-051975-08-05
19831983-07-091983-07-11
19861986-06-271986-06-27
20192019-07-282019-07-28

Every Fixed Threshold

Fixed thresholds at Hanko Tvarminne
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4319831
0 C (32 F): Ice days (max64105201051
0 C (32 F): Frost days (min64160196676
-10 C (14 F): Days with min6269196328
-20 C (-4 F): Days with min342319852
-30 C (-22 F): Days with min7319873
20 C (68 F): Tropical nights (min121120182
10 mm (0.39 in): Days with 10 mm or more rain642720127
25 mm (0.98 in): Days with 25 mm or more rain41419704
50 mm (1.97 in): Days with 50 mm or more rain4220232

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

  • Data for Hanko Tvarminne threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).